Yes, the batteries are rechargeable. And you don’t need to purchase a charger as we’ve built the  charging station right into our patent pending SmartHub. No wires or extra components to keep track of! No more wondering which drawer you left the charger in. In addition, Deep Sentinel’s system comes with a spare battery, so you always have one ready when you need it.  This way, while the charge time is 3 hours, you can keep the 3 cameras working at all times.